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The Basal Zone of the Thor Lake peralkaline intrusive complex is enriched in heavy rare earth elements. Avalon's plan is to establish the feasibility of an underground mine which processes Basal Zone ore.
The Upper Zone of the Thor Lake peralkaline intrusive complex occurs above the Basal Zone and is dominated by light rare earth elements. Although Avalon is measuring this resource it does not plan to mine it.
During the summer of 2009 Forum collected 255 prospecting samples from the Nutaaq project in Nunavut near the Kiggavik uranium project of Areva. Of these 155 samples graded more than 0.1% TREO, and of these 25 samples graded more than 0.5% TREO. The average of these 25 samples was 1.13% TREO, of which 8.5% represented heavy rare earth elements. A selection of 5 of the top samples averaged 2.4% with a rock value of $263/t.
The Hoidas Lake vein is the only project for which Great Western has a 43-101 resource estimate. No process yet exists for the recovery of REE from the host mineral.
The Steenkampskraal dyke in South Africa was previously mined for thorium, which is associated with monazite, the main REE mineral.
The Douglas River prospect in the Athabasca Basin consists of sandstone hosted lenses of the HREE bearing mineral xenotime which is associated with thorium. Toyota signed a 6 month exclusive period to negotiate a property option in July 2009.
The Benjamin River prospect in New Brunswick has a mix of LREE and HREE. Toyota signed a 6 month exclusive period to negotiate a property option in July 2009.
The ST1 target is one of two LREE enriched zones Hudson has drilled on the northern flank of the Sarafartoq carbonatite complex in Greenland.
The ST40 zone attracted attention in 2009 because surface sampling revealed a percentage of neodymium that was unusually high for LREE dominated carbonatite systems. Subsequent drilling suggests that this was a local phenomenon.
These are the head grades for a bulk sample that Iron Ore Company collected from the Main Zone of the Strange Lake peralkaline intrusive from a pit on the Quebec part of the deposit.
This distribution represents the contained rare earth elements for the samples Mitsui used for its 1992-1996 metallurgical study on the Strange Lake Main Zone in which it claimed to have established an effective recovery process flowsheet but declared the project as subeconomic at the time due to then prevailing rare earth oxide prices. These assays cover all the REE.
These values come from sampling Quest did from representative material from the Main Zone pit from which IOC collected its own bulk sample. Unlike the IOC data which is missing several HREE, the Quest sample includes all.
The B Zone is about 5 km northwest of the Main Zone at Strange Lake. These plots represent the average of 30 samples taken from outcrop and angular boulders from which any grades above 3% TREO have been excluded.
This plot represents the weighted average of all 19 holes drilled into the B Zone during 2009, what we are calling the "Outer Footprint".
This plot represents the weighted average of all 13 holes drilled into the B Zone during 2009, what we are calling the "Inner Footprint".
This plot is a representative distribution of the pegmatite horizon within the BZone.
Misery Lake is a grassroots discovery made in 2009 which appears to be a peralkaline intrusive with a distribution similar to the Basal Zone of Nechalachoo (Thor Lake).
The Clay-Howells carbonatite dyke in northern Ontario was initially drilled as a 10 million tonne magnetite deposit, but, based on re-assaying of old drill core which revealed REO mineralization throughout the core, it is now being re-asssessed for its potential as a LREE deposit.
Kutessy II is a breccia pipe system in Kyrgyzstan that was open pit mined at about 300,000 tpa from 1958-1991. Although the recovered grade of 0.41% TREO was low, 50% represented HREE. The remaining resource is estimated to average 0.29% TREO as a recoverable grade.
The I&L zone at Bokan Mountain consists of narrow veins/dykes within the peralkaline intrusive, on strike with the Dotson Shear whose REE mineralization occurs outside the intrusive itself.
The USGS took several small bulk samples from various parts of the Dotson Shear. The Dotson II samples yielded a high grade and a elevated HREE values.
Here is the distribution established through a 2009 drill program which tested the Dotson Shear in the third dimension for the first time.
The Cheri bulk sample was collected from the Cheri Dyke north of Kendrick Bay which parallels the Dotson Shear.
Here is the distribution established through a 2009 drill program which tested the Cheri Shear in the third dimension for the first time
The Geoduck dyke is one of several shears parallel to the Dotson Shear east of Bokan Mountain which Ucore drilled in 2009.
The Geiger dyke emerges from the northern side of Bokan Mountain and strikes more northerly than the NW-SE strike of the other dykes. It appears to be lower grade but has an REE distribution similar to that of the other Bokan Mtn dykes.
The Sunday Lake zone is similar to the I&L zone except that it occurs on the northern flank of Bokan Mountain in an area from which the northerly striking Geiger dyke originates.
